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Vinu Patel

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545. selvasundaram balasubramanian 1
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547. Vinu Patel 1
548. Lasith Premathilaka 1
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last 3 solved tasks
What 5-digit number satisfies the following requirements? 1. No zeroes; 2. First two digits are the same; 3. Fourth digit is twice the first; 4. Last digit is twice the third; 5. Sum of all digits is 18

First U.S. commercial gasoline engine

In 1872, George B. Brayton of Boston, Mass. (3 Oct 1830 - 17 Dec 1892) received a U.S. patent for a gas-powered engine (No. 125,166). He did pioneering work inventing this first American commercial internal combustion engine, which he manufactured and sold. Its principle of continuous ignition later became the basis for the turbine engine. A pressurized air-fuel mixture from a reservoir was ignited upon entering a water-cooled cylinder. The Brayton engine was tried in watercraft, one of John Holland's submarines and one for a few months installed in a carriage (1872-3). He held British patent Jul 1890, No. 11,062.«

The math teacher saw that Daph...

The math teacher saw that Daphne wasn't paying attention in class.
She called on her and said, "Daphne! What are 2 and 4, and 28 and 44?"
Daphne quickly replied, "ABC, CBS, HBO and the Cartoon Network!"
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